Beijing North Refractories Co., Ltd.
Beijing North Refractories Co., Ltd.

North Refractories offer special customized components manufacturing service including but no limit to making launders, bushes, lining boards for holding furnaces, floats, spouts, transition plates, hot top ring headers, tap out cones, flow pipes, nozzles, please contact us for details about your requirements.

Calcium Silicate Structural Inserts

Calcium silicate structural inserts are stiff pipe hanger inserts that provide exceptional structural strength and resistance to abuse. They are made to sustain the weight of pipes and keep insulation from crushing at the pipe hanger in a hanging pipe system, especially in high-temperature applications. Supports for calcium silicate pipe insulation come in a variety of sizes and can be either plain or fronted.
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Deep Bed Filtration Board

Prior to the casting process, metal is purified using a deep-bed filtration system, which achieves filtering efficiencies of over 90%. Slab rolling, ingot, and continuous sheet casting operations frequently use these technologies.
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Transition Plates

Replaceable calcium silicate components built into the billet mold assemblies are called NR Transition Plates for Vertical Direct Chill (VDC) Billet Casting Equipment and NR Header Plates for Horizontal Direct Chilled (HDC) Casting Machines.
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Launder Dam

The launder and the launder dam are intended to function together. It is specifically designed to regulate the flow of molten aluminum and is made of the cutting-edge NR-80 technological calcium silicate material. This product is appropriate for high-value, high-tech aluminum casting applications since it resists corrosion and doesn't contaminate the molten metal.
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Sprue Bushes

Due to their heat resistance and non-wetting qualities with molten aluminum, NR-85 calcium silicate boards, a high-density calcium silicate board, are utilized in the foundry and aluminum casting industries to make sprue bushes.
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Distribution Launder

Launders, also known as troughs, use gravity to transport molten metal from one location to another via a series of specially designed, high-temperature channels, often with the help of a pumping system.
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Products

Key Benefits of Custom Calcium Silicate Parts

1

Heat Resistance – Withstands up to 1100°C (2012°F)

2

Lightweight – 30% lighter than traditional insulation


3

Machinability – Can be cut, drilled, and threaded like metal


4

Chemical Resistance – Ideal for corrosive environments


How Are Calcium Silicate Parts Machined? (Process & Tolerances)

How Are Calcium Silicate Parts Machined? (Process & Tolerances)

Calcium silicate is machined using diamond-coated CNC tools to prevent chipping. The process includes:

  • CAD Design – Optimized for manufacturability (DFM)

  • Precision Machining – CNC milling, lathing, or grinding

  • Post-Processing – Polishing, coating, or heat treatment


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